Plumb-level



(No Model.)

' E. M. KEAGLE 8v W. L. FOLLMER.

PLUMB LEVEL.

No. 460,749. Patented Oct. 6, 189.1.

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la a! i d v/ mm g f s@ n* VI/ UNITED STATES` PATENT OFFICE.

EDWARD M. KEAGLE AND WILLIAM L. FOLLMER, OF MILTON, PENNSYLVANIA.

PLUME-LEVEL.

SPECIFICATION forming part of Letters Patent No. 460,749, dated October6, 1891.

Application led March 4, 1891. Serial No. 383,741. (No model.)

To all whom it may concern.-

Be it known that we, EDWARD M. KEAGLE and WILLIAM L. FOLLMER, citizensof the United States, residing at Milton, in the county ofNorthumberland and State of Pennsylvania, have invented a new and usefulLevel, ot which the following is a specification.

The invention relates to improvements in levels. v

The object of the present invent-ion is to provide a simple andinexpensive level which will be strong and durable and adapted to bereadily employed in grading and the like, and which will readilyindicate the degree of inclination.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out inthe claims hereto appended.

In the drawings, Figure 1 is a front elevation of a level constructed inaccordance with this invention. -Fig 2 is a central transverse.sectional view.

Referring to the accompanying drawings, 1 designates a casingconstructed of metal and composed of two sections 2 and 3, one of whichhas its outer edge threaded, and the front sect-ion 3 iscircumferentially rabbeted andinteriorly threaded and adapted to screwon the section 2, and secured at the inner end of the recess 4, formedby rabbeting, is a glass face-plate 5. The rear section 2iscircumferentially rabbeted at its exterior to provide a recess 0 toenable the outer faces of the sections to be iinsh, and the rear sectionis checkered at 7 to prevent the hands slipping when screwing orunscrewing the sections. The front section is provided with acircumferential flange 8, which presents a large face to the level andfacilitates attachment to a bar, in which the device is designed to beattached, as will be well understood.

Arranged on the inner face of the back of the section 2 is a graduateddial-plate 9, which is divided into four equal parts by diametricallines, and the spaces between the lines are divided into degrees from Oto 90, and operating on they dial-plate 9 is an indicator 10. Theindicator 10 consists of a vertical hand 11,two horizontal hands 12, anda rigid plumb-bob, all formed integral and arranged to indicate thedegree of inclination of a grade orsurface, and the lower. end of therigid plumb-bob is pointed and is adapted to indicate the degrees at thebottom of the level. The said indicator is centrally mounted on aset-screw 13, which is arranged in a central opening of the section 2and has its head arranged outside the casing and is adapted to readilytake up any wear and regulate the stiifness of the indicator. Theset-screw has its inner end pointed and engages a central conical cavity14 of a pin 15, which is secured in a central opening of the indicatorand has its front end 16 pointed and centered in the glass plate 5.

It will be seen that the indicator is delicately mounted and is adaptedto be readily adjusted by the set-screw and that the casing may bereadily separated when it is desired to remove the indicator or examinethe interior.

What we claim is- 1. In a level,the combination ot' the casingcomprising the rear section 2, havingits outer face circumferentiallyrecessed and threaded, and the section 3, having its inner facecircumferentially recessed and threaded and adapted to engage thesection 2, the glass plate 5, secured in the recess of the section 3 andheld between the two sections, the graduated dial-plate, andtheindicator arranged within the casing, substantially as described.

2. In a level, the combination of the glass plate, the casing consistingof two sections threaded and adapted to receive and clamp the glassplate, the graduated dial-plate, the set-screw centrally mounted in thecasing, the indicator provided with the vertical and horizontal handsand having the rigid plumbbob, and the pin centrally secured to theindicator and having its front end centered in the glass plate and itsrear end provided with a recess to receive the set-screw, substantiallyas described.

In testimony that we claim the foregoing

